Coil for an electrical machine, and method for producing a coil

Abstract

A coil for a particularly compact coil for an electrical machine, in which coil an electrical conductor is wound with a number of turns, which are arranged one above the other in a number of layers, with the turns in a first layer being arranged parallel alongside one another, and the turns in a second layer being inclined through a predetermined inclination angle (a), with respect to the turns in the first layer, at a predetermined point and being arranged parallel alongside one another.

What is claimed is:  
     
       1. A coil arrangement for an electrical machine, in which an electrical conductor is wound with a plurality of turns (N(L 1 ), N(L 2 ), in each of at least two layers with the plurality of turns of a second layer being positioned above the plurality of turns of a first layer, wherein 
       the turns (N(L 1 )) in said first layer (L 1 ) are arranged parallel to one another, and the turns (N(L 2 )) in the second layer (L 2 ) are inclined, at a predetermined point at a predetermined inclination angle (a), with respect to the turns ((N(L 1 )) in the first layer (L 1 ), and wherein the plurality of turns in the second layer are arranged parallel alongside one another wherein the inclination angle (a) is such that each turn (N(L 2 )) in the second layer (L 2 ) is inclined by at least one pitch width.  
     
     
       2. The coil arrangement according to  claim 1 , wherein an individual turn (N(L 1 ), N(L 2 )) in one of the layers (L 1 , L 2 ) is inclined by a total pitch width (G), which is formed by a total number of pitches in an adjacent layer (L 1 , L 2 ). 
     
     
       3. A The coil arrangement according to  claim 1 , wherein a coil start (S(A)) and coil (S(E)) are passed out jointly at one end winding, with the turns (N(L 2 )) in the second layer (L 2 ) at an opposite end winding being inclined at the inclination angle (a). 
     
     
       4. The coil arrangement according to  claim 3 , wherein the end windings are domed outwards. 
     
     
       5. The coil arrangement according to  claim 1 , wherein the plurality of turns (N(L 1 ), N(L 2 )), in one of said layers (L 1 , L 2 ) are arranged parallel alongside one another, partially superimposed. 
     
     
       6. A method for producing a coil arrangement for an electrical machine, comprising the steps of: 
       winding an electrical conductor on a coil former with a first plurality of turns to form a second layer on and above said layer, wherein the step of forming said second layer includes the step of bending the electrical conductor through a predetermined bending angle at a predetermined point before said second plurality of turns is wound on said coil former.  
     
     
       7. The method according to  claim 6 , wherein the turns in the first layer are wound parallel alongside one another, with the turns in the second layer being inclined through the bending angle with respect to the first layer and being arranged parallel alongside one another. 
     
     
       8. The method according to  claim 6 , wherein the bending angle is such that each turn in the second layer is inclined by at least one pitch width. 
     
     
       9. The method according to  claim 6 , wherein one turn in one of the layers is inclined by the total pitch width, which is formed by the total number of pitches in an adjacent layer. 
     
     
       10. The method according to  claim 7 , wherein a coil start and coil end are passed out jointly at one end, with the turns in the second layer at the opposite end winding being inclined at the bending angle before being wound on to the coil former. 
     
     
       11. The method according to  claim 6 , wherein the turns in a single layer are wound parallel alongside one another, partially superimposed.